I dunno how else to proceed than grand jury. Remember if Florida vs George Zimmermann had grand jury they’d had find out right away they had no case.
The way I see it is that Officer Wilson was just performing his job, ably and admirably. There was not a scintilla of wrongdoing and thus it was unjust to present it to a Grand Jury at all. There simply was no case and the ‘RAT McCullouch is the guilty party. Wilson’s good name is irrevocably tarnished because of ‘RAT misdeeds.